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27 条记录 (耗时 0.059 秒)

    Membranes
    4.
    发明授权
    Membranes 失效
    膜

    公开(公告)号：US4920193A

    公开(公告)日：1990-04-24

    申请号：US221434

    申请日：1988-07-19

    申请人： Richard A. Hann ,  David R. Holmes ,  John W. Smith

    发明人： Richard A. Hann ,  David R. Holmes ,  John W. Smith

    IPC分类号： C08J5/18 ,  B01D65/10 ,  B01D67/00 ,  B01D71/68 ,  B01D71/82 ,  C08G65/48 ,  C08J3/09

    CPC分类号： C08J3/095 ,  B01D67/0011 ,  B01D69/02 ,  B01D71/68 ,  C08G65/48 ,  B01D2323/08 ,  B01D2323/12 ,  B01D2323/30 ,  C08J2381/06

    摘要： An asymmetric membrane formed from a sulphonated polyarylethersulphone has a salt rejection of at least 99%. Alternatively, a membrane has a good salt rejection and an acceptable water flux such that the ratio ##EQU1## has the value of at least 0.7. The membranes can be obtained using barium salts of the sulphonated polyarylethersulphone, with the proportion of barium being controlled to be at least 85%, preferably at least 86%, and not more than 91%, preferably not more than 90% of the barium required to react with the sulphonic acid groups on the sulphonated polymer.

    摘要翻译： 由磺化聚芳砜砜形成的非对称膜具有至少99％的耐盐析。 或者，膜具有良好的拒盐性和可接受的水通量，使得比值具有至少0.7的值。 可以使用磺化的聚芳基砜砜的钡盐来获得膜，钡的比例控制在所要求的钡的至少85％，优选至少86％，不超过91％，优选不超过90％ 与磺化聚合物上的磺酸基反应。

    Steerable catheter with external guidewire as catheter tip deflector
    8.
    发明授权
    Steerable catheter with external guidewire as catheter tip deflector 有权
    可导向导管，外导管作为导管尖端导流器

    公开(公告)号：US6126649A

    公开(公告)日：2000-10-03

    申请号：US329386

    申请日：1999-06-10

    申请人： Robert A. VanTassel ,  Robert S. Schwartz ,  David R. Holmes

    发明人： Robert A. VanTassel ,  Robert S. Schwartz ,  David R. Holmes

    IPC分类号： A61M25/01 ,  A61M25/09

    CPC分类号： A61M25/0138 ,  A61M25/0147 ,  A61B2017/22041 ,  A61B2017/22045 ,  A61M2025/0177

    摘要： A steerable catheter in which a guidewire can serve a dual purpose of deflecting a bendable element at a distal end of the steerable catheter and as a guidewire to facilitate the placement of a working catheter within the vascular system. The guidewire is adapted to be slidingly received within routing eyelets or the like where one of such eyelets is disposed at a distal end of the bendable element and another near the proximal end thereof. The guidewire can be readily advanced in the distal direction relative to the steerable catheter, but tensioning of the guidewire at its proximal end serves to deflect and bend the bendable element.

    摘要翻译： 可导向的导管，其中导丝可以用于在可操纵导管的远端处偏​​转可弯曲元件的双重目的，并且用作导丝，以便于在血管系统内放置工作导管。 导丝适于滑动地容纳在布置孔眼等内，其中这些孔眼之一设置在可弯曲元件的远端，另一个靠近其近端。 导丝可以相对于可导向导管在远端方向上容易地前进，但是导丝在其近端处的张紧用于使可弯曲元件偏转和弯曲。

    Method for the production of an asymmetric semipermeable membrane from a solution of a sulfonated polyarylethersulfone
    9.
    发明授权
    Method for the production of an asymmetric semipermeable membrane from a solution of a sulfonated polyarylethersulfone 失效
    从磺化聚合物胶体溶液中生产不对称可切割膜的方法

    公开(公告)号：US5112892A

    公开(公告)日：1992-05-12

    申请号：US578294

    申请日：1990-09-06

    申请人： Peter T. Cardew ,  David R. Holmes ,  John W. Smith

    发明人： Peter T. Cardew ,  David R. Holmes ,  John W. Smith

    IPC分类号： C08J5/18 ,  B01D67/00 ,  B01D71/68 ,  B01D71/82 ,  C08J3/09 ,  C08L81/00 ,  C08L81/06

    CPC分类号： C08J3/091 ,  B01D67/0011 ,  B01D67/0013 ,  B01D69/02 ,  B01D71/68 ,  B01D2325/022 ,  C08J2381/06

    摘要： A polymer solution contains a sulphonated polyarylethersulphone in a solvent mixture containing at least three components, where the solvent mixture has a delta-H in the range from 3 to 8.5; a delta-P in the range from 4 to 8 and a delta-D in the range 7.2 to 9.5 and each component of the solvent mixture is a liquid or low melting solid which is a non-solvent or poor solvent for the sulphonated polyarylethersulphone, and at least one of the components satisfies at least one of the conditions:a) said component has a delta-D of less than 8 when the value of delta-P is not more than 3; andb) said component has a delta-H of greater than 3 when the value of delta-P is at least 8.5; andc) said component has a delta-H of less than 8 when it contains at least one hydroxylic group; andd) said component is free of hydroxylic groups and has a delta-P which is greater than 3 and less than 8.5.The solution can be used for the production of membranes suitable for use in reverse osmosis applications.

    摘要翻译： 聚合物溶液在含有至少三种组分的溶剂混合物中含有磺化的聚芳醚砜，其中溶剂混合物的δ-H在3至8.5的范围内; δ-P在4至8的范围内，Δ-D在7.2至9.5的范围内，溶剂混合物的每个组分是液体或低熔点固体，其是用于磺化聚芳基醚砜的非溶剂或不良溶剂， 并且所述组分中的至少一个满足以下条件中的至少一个：a）当Δ-P的值不大于3时，所述组分的δ-D小于8; 和b）当Δ-P的值至少为8.5时，所述组分的Δ-H大于3; 和c）当其含有至少一个羟基时，所述组分的δ-H小于8; 和d）所述组分不含羟基并且具有大于3且小于8.5的δ-P。 该溶液可用于生产适用于反渗透应用的膜。